Setting UP ASA 5520 for Failover

I have (2) ASA 5520 Firewalls with three Interface. Port 0 is used for Outside, and Port 1 is used for Inside Network. Is it possible to used Port 2 for both LAN and Stateful firewall configuration. The idea is to create sub-interfaces on Port 2 such as 2.1 for LAN Failover and 2.2 for Stateful Failover.